Alligator
Alligator turns up in 2 fields: logistics, mechanical. Here is what it means to the people in each one.
Alligator in logistics
A large, dangerous strip of shredded tire tread lying on the highway.
A piece of discarded tire tread, typically from a blown commercial truck retread, resting in a traffic lane. The name comes from the way the curved, jagged strip of black rubber resembles an alligator resting on the asphalt. Hitting one at highway speeds can cause severe damage to a vehicle's undercarriage or kick up debris into trailing traffic.
"Watch your lane, there's a massive alligator sitting right on the white line near mile marker 42."
Alligator in mechanical
A heavy-duty mechanical shear or crusher featuring a hinged, lever-actuated upper jaw.
This mechanism uses a heavy pivoting upper beam that bites down against a fixed lower bed, heavily resembling a reptile's mouth. It provides massive mechanical advantage for shearing scrap metal or crushing bulk materials, typically driven by a large hydraulic cylinder or a heavy flywheel and crank.
"Keep your hands well clear of the alligator when feeding that bar stock, it will snap a crowbar in half without stalling."